For those who are interested, the Gutenberg Project makes books whose copyright has expired available for free in ebooks (kindl, epub, pdf, etc). You will find a large collection of the classics (Austen, Dickens, Tolstoy, etc). If the copyright for the translated versions hasn't expired, you may only find the book in its original language.
They always need volunteers to convert books into ebooks. So if you have time, please help out.